GNU bug report logs - #7079
24.0.50; shelling out picks up ghost error about find

Previous Next

To add a comment to this bug, you must first unarchive it, by sending
a message to control AT debbugs.gnu.org, with unarchive 7079 in the body.
You can then email your comments to 7079 AT debbugs.gnu.org in the normal way.

Toggle the display of automated, internal messages from the tracker.

Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Joseph Brenner <doom <at> kzsu.stanford.edu>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.0.50; shelling out picks up ghost error about find
Date: Mon, 20 Sep 2010 16:22:40 -0700

I often see elisp code using things such as compile-command returning
spurious errors from a "find" shell command which was not run.

Recipie:

(1) With the following elisp in the file ~/tmp/baby-perlnow.el:

  (provide 'baby-perlnow)
  (defun perlnow-run-check ()
    "Run a perl check on the current buffer."
    (interactive)
    (let* ( (full-file (buffer-file-name))
            (location (file-name-directory full-file))
            (filename (file-name-nondirectory full-file))
            (default-directory location)
            )
      (save-buffer)
      (setq compile-command
            (format "perl -Mstrict -cw \'%s\'" filename))
      (compile compile-command)
      ))

(2) And with some perl code such as ~/tmp/Dummy.pm:

  package Dummy;
  use 5.008;
  use strict;
  use warnings;

  sub whatever {
    print "whatever\n";
  }
  1;

(3) Then run emacs like so:

  emacs -Q -l ~/tmp/baby-perlnow.el ~/tmp/Dummy.pm

And do an:
  ESC-x perlnow-run-check

(4) In the *compilation* buffer, you may see something like:

  -*- mode: compilation; default-directory: "~/tmp/" -*-
  Compilation started at Mon Sep 20 10:52:28

  perl -Mstrict -cw 'Dummy.pm'
  find: paths must precede expression: Rep.pm
  Usage: find [-H] [-L] [-P] [-Olevel] [-D help|tree|search|stat|rates|opt|exec] [path...] [expression]
  Dummy.pm syntax OK

  Compilation finished at Mon Sep 20 10:52:28

Note that nothing is actually running a "find" command here, and
yet we see the error message from find.

You can verify that the perl check command is not causing the
problem by doing this in a shell window:

  cd ~/tmp
  perl -Mstrict -cw 'Dummy.pm'
  Dummy.pm syntax OK

Note that the find error is referring to some other file, Rep.pm
which as it happens *was* being edited in another emacs process
but not *this* one.

The only buffers open in the -Q emacs are:

.   Dummy.pm                95  Perl		  ~/tmp/Dummy.pm
    *scratch*              191  Lisp Interaction
  * *Messages*              89  Fundamental

I've seen this behavior in a number of contexts... perhaps
notably in the Emacs::Rep code (still under development) which
does some "shell-command-to-string" calls internally.


In GNU Emacs 24.0.50.1 (x86_64-unknown-linux-gnu, GTK+ Version 2.16.1)
 of 2010-09-19 on fineline
Windowing system distributor `The X.Org Foundation', version 11.0.10600000
configured using `configure  '--prefix' '/usr/local/emacs/bzr-091910-182331''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: nil
  locale-coding-system: utf-8-unix
  default enable-multibyte-characters: t

Major mode: MH-Folder

Minor modes in effect:
  hl-line-mode: t
  shell-dirtrack-mode: t
  show-paren-mode: t
  display-time-mode: t
  tooltip-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
C-a C-n C-n C-n C-e o h SPC b o y , SPC b a d SPC E
R R S-SPC m e s s a g e s C-a C-n C-n C-n C-n A r e
SPC y o u SPC t h e r e < <backspace> ? S-SPC SPC J
u s t SPC c h e c k i n g . SPC SPC M e SPC g e t t
i n g SPC a b d SPC <backspace> <backspace> <backspace>
<backspace> b a a d SPC l o <backspace> <backspace>
<backspace> <backspace> a d SPC l o g i n SPC m a <backspace>
e s s a g e s SPC <return> o u t SPC o f SPC n m h
SPC i n c , SPC m e SPC t h i n g s . <backspace> <backspace>
<backspace> k s . C-x C-b C-x o C-n C-n <escape> >
C-p f C-x K <return> C-p C-p f C-x K <return> C-p f
C-r E R R C-a C-r C-r C-p C-a <escape> < C-v C-v C-v
C-x 0 . . SPC a n d SPC y e t SPC m y SPC " i " SPC
w o k <backspace> r k s SPC a s SPC a l w a y s . C-a
C-n C-n C-c C-c C-x 1 <escape> > i C-x o C-p . C-x
o C-x 2 C-x o M-x s h e l l <return> i n c <return>
C-x C-p C-x C-p i C-x o C-p C-p C-p C-p C-l C-n . o
C R O N SPC <return> x i C-x o C-p . M-x r e p o r
t SPC e m a c s SPC b u SPC <return>

Recent messages:
Scanning +inbox...done
No current message
Scanning +FIRST...done
Scanning +FIRST...done
Scanning +SECOND...done
No current message
Scanning +SECOND...done
No current message
Mark set [3 times]
doom-mh-show msg: 6109

Load-path shadows:
/home/doom/End/Cave/DesktopAutosave/lib/emacs/desktop-recover-setup hides /home/doom/lib/emacs/Dots/desktop-recover-setup
/home/doom/End/Cave/DiredExternalApps/lib/emacs/image-dired hides /home/doom/lib/emacs/image-dired
/home/doom/End/Cave/DiredExternalApps/lib/emacs/dired-external-apps hides /home/doom/lib/emacs/dired-external-apps
/home/doom/lib/emacs/Dots/setup-colors-dark hides /home/doom/lib/emacs/setup-colors-dark
/home/doom/End/Cave/DiredExternalApps/lib/emacs/image-dired hides /usr/local/emacs/bzr-091910-182331/share/emacs/24.0.50/lisp/image-dired
/home/doom/lib/emacs/Dots/strokes hides /usr/local/emacs/bzr-091910-182331/share/emacs/24.0.50/lisp/strokes
/usr/local/emacs/cvs-040510/share/emacs/23.1.90/lisp/mh-e/mh-thread hides /usr/local/emacs/bzr-091910-182331/share/emacs/24.0.50/lisp/mh-e/mh-thread
/usr/local/emacs/cvs-040510/share/emacs/23.1.90/lisp/mh-e/mh-funcs hides /usr/local/emacs/bzr-091910-182331/share/emacs/24.0.50/lisp/mh-e/mh-funcs
/usr/local/emacs/cvs-040510/share/emacs/23.1.90/lisp/mh-e/mh-alias hides /usr/local/emacs/bzr-091910-182331/share/emacs/24.0.50/lisp/mh-e/mh-alias
/usr/local/emacs/cvs-040510/share/emacs/23.1.90/lisp/mh-e/mh-letter hides /usr/local/emacs/bzr-091910-182331/share/emacs/24.0.50/lisp/mh-e/mh-letter
/usr/local/emacs/cvs-040510/share/emacs/23.1.90/lisp/mh-e/mh-buffers hides /usr/local/emacs/bzr-091910-182331/share/emacs/24.0.50/lisp/mh-e/mh-buffers
/usr/local/emacs/cvs-040510/share/emacs/23.1.90/lisp/mh-e/mh-print hides /usr/local/emacs/bzr-091910-182331/share/emacs/24.0.50/lisp/mh-e/mh-print
/usr/local/emacs/cvs-040510/share/emacs/23.1.90/lisp/mh-e/mh-mime hides /usr/local/emacs/bzr-091910-182331/share/emacs/24.0.50/lisp/mh-e/mh-mime
/usr/local/emacs/cvs-040510/share/emacs/23.1.90/lisp/mh-e/mh-xface hides /usr/local/emacs/bzr-091910-182331/share/emacs/24.0.50/lisp/mh-e/mh-xface
/usr/local/emacs/cvs-040510/share/emacs/23.1.90/lisp/mh-e/mh-junk hides /usr/local/emacs/bzr-091910-182331/share/emacs/24.0.50/lisp/mh-e/mh-junk
/usr/local/emacs/cvs-040510/share/emacs/23.1.90/lisp/mh-e/mh-identity hides /usr/local/emacs/bzr-091910-182331/share/emacs/24.0.50/lisp/mh-e/mh-identity
/usr/local/emacs/cvs-040510/share/emacs/23.1.90/lisp/mh-e/mh-tool-bar hides /usr/local/emacs/bzr-091910-182331/share/emacs/24.0.50/lisp/mh-e/mh-tool-bar
/usr/local/emacs/cvs-040510/share/emacs/23.1.90/lisp/mh-e/mh-gnus hides /usr/local/emacs/bzr-091910-182331/share/emacs/24.0.50/lisp/mh-e/mh-gnus
/usr/local/emacs/cvs-040510/share/emacs/23.1.90/lisp/mh-e/mh-limit hides /usr/local/emacs/bzr-091910-182331/share/emacs/24.0.50/lisp/mh-e/mh-limit
/usr/local/emacs/cvs-040510/share/emacs/23.1.90/lisp/mh-e/mh-scan hides /usr/local/emacs/bzr-091910-182331/share/emacs/24.0.50/lisp/mh-e/mh-scan
/usr/local/emacs/cvs-040510/share/emacs/23.1.90/lisp/mh-e/mh-loaddefs hides /usr/local/emacs/bzr-091910-182331/share/emacs/24.0.50/lisp/mh-e/mh-loaddefs
/usr/local/emacs/cvs-040510/share/emacs/23.1.90/lisp/mh-e/mh-show hides /usr/local/emacs/bzr-091910-182331/share/emacs/24.0.50/lisp/mh-e/mh-show
/usr/local/emacs/cvs-040510/share/emacs/23.1.90/lisp/mh-e/mh-folder hides /usr/local/emacs/bzr-091910-182331/share/emacs/24.0.50/lisp/mh-e/mh-folder
/usr/local/emacs/cvs-040510/share/emacs/23.1.90/lisp/mh-e/mh-search hides /usr/local/emacs/bzr-091910-182331/share/emacs/24.0.50/lisp/mh-e/mh-search
/usr/local/emacs/cvs-040510/share/emacs/23.1.90/lisp/mh-e/mh-seq hides /usr/local/emacs/bzr-091910-182331/share/emacs/24.0.50/lisp/mh-e/mh-seq
/usr/local/emacs/cvs-040510/share/emacs/23.1.90/lisp/mh-e/mh-e hides /usr/local/emacs/bzr-091910-182331/share/emacs/24.0.50/lisp/mh-e/mh-e
/usr/local/emacs/cvs-040510/share/emacs/23.1.90/lisp/mh-e/mh-comp hides /usr/local/emacs/bzr-091910-182331/share/emacs/24.0.50/lisp/mh-e/mh-comp
/usr/local/emacs/cvs-040510/share/emacs/23.1.90/lisp/mh-e/mh-compat hides /usr/local/emacs/bzr-091910-182331/share/emacs/24.0.50/lisp/mh-e/mh-compat
/usr/local/emacs/cvs-040510/share/emacs/23.1.90/lisp/mh-e/mh-utils hides /usr/local/emacs/bzr-091910-182331/share/emacs/24.0.50/lisp/mh-e/mh-utils
/usr/local/emacs/cvs-040510/share/emacs/23.1.90/lisp/mh-e/mh-inc hides /usr/local/emacs/bzr-091910-182331/share/emacs/24.0.50/lisp/mh-e/mh-inc
/usr/local/emacs/cvs-040510/share/emacs/23.1.90/lisp/mh-e/mh-speed hides /usr/local/emacs/bzr-091910-182331/share/emacs/24.0.50/lisp/mh-e/mh-speed
/usr/local/emacs/cvs-040510/share/emacs/23.1.90/lisp/mh-e/mh-acros hides /usr/local/emacs/bzr-091910-182331/share/emacs/24.0.50/lisp/mh-e/mh-acros
/home/doom/lib/emacs/Dots/gnus-setup hides /usr/local/emacs/bzr-091910-182331/share/emacs/24.0.50/lisp/gnus/gnus-setup

Features:
(shadow sort emacsbug mh-search mh-alias crm mail-extr mh-mime
multi-isearch mule-util mh-identity mh-letter executable mh-show
goto-addr gnus-cite gnus-art mm-uu mml2015 epg-config gnus-sum nnoo
gnus-group time-date gnus-undo nnmail mail-source format-spec gnus-start
gnus-spec gnus-int message rfc822 gmm-utils mailheader gnus-win
gnus-range gnus gnus-ems nnheader mail-utils mh-seq mh-inc hl-line
mh-tool-bar mh-xface mh-utils mh-folder which-func imenu thingatpt
desktop desktop-recover desktop-recover-setup finder-inf package
doom-fineline ansi-color registers-defined image-mode junk-dired
junk-setup datestamps live-dangerously strokes macroman doom-filters
find_and_replace json rep rep-setup doom-mh mh-comp sendmail mh-scan
mh-gnus mml mml-sec mm-view smime password-cache dig mailcap mm-decode
mm-bodies mm-encode mail-parse rfc2231 rfc2047 rfc2045 ietf-drums
mm-util mail-prsvr gnus-util mh-e mh-compat mailabbrev mh-acros
mh-buffers mh-loaddefs mhe-setup-x pic fugly-keystroke-macros
dired-imagery-doomery-keystroke-macros image-dired thinknow picture
doomfile doomfiles-hacking-setup caving-setup w3m-load html-setup
perlnow-x perlnow template perlnow-setup sepia sepia-cpan sepia-ido ido
sepia-tree tree-widget sepia-w3m w3m-perldoc w3m browse-url timezone
w3m-hist w3m-e22 wid-edit w3m-ccl ccl w3m-fsf w3m-favicon w3m-image
w3m-proc w3m-util gud easy-mmode cperl-mode easymenu sepia-setup
apache-dev perl-setup elisp-hacking-setup doom-print printer-setup
shell-setup perlups derived byte-opt bytecomp byte-compile jka-compr
find-func timeclock-x timeclock timeclock-setup shell comint ring
dired-external-apps ls-lisp dired-sort-map dired-setup save-to-registers
basic-keymap-changes paracide redroot simple-color-change
setup-colors-dark move-frame man-apropos edmacro kmacro zoom-frm
frame-cmds frame-fns avoid zoom-frm-setup text-setup dired-x dired-aux
dired regexp-opt paren uniquify advice help-fns advice-preload warnings
server time emacs-setup cl cl-19 load-path-setup tooltip ediff-hook
vc-hooks lisp-float-type mwheel x-win x-dnd tool-bar dnd fontset image
fringe lisp-mode register page menu-bar rfn-eshadow timer select
scroll-bar mldrag mouse jit-lock font-lock syntax facemenu font-core
frame cham georgian utf-8-lang misc-lang vietnamese tibetan thai
tai-viet lao korean japanese hebrew greek romanian slovak czech european
ethiopic indian cyrillic chinese case-table epa-hook jka-cmpr-hook help
simple abbrev loaddefs button minibuffer faces cus-face files
text-properties overlay md5 base64 format env code-pages mule custom
widget hashtable-print-readable backquote make-network-process dbusbind
dynamic-setting system-font-setting font-render-setting move-toolbar gtk
x-toolkit x multi-tty emacs)

Message #8 received at 7079 <at> debbugs.gnu.org (full text, mbox):

From: Chong Yidong <cyd <at> stupidchicken.com>
To: Joseph Brenner <doom <at> kzsu.stanford.edu>
Cc: 7079 <at> debbugs.gnu.org
Subject: Re: 24.0.50; shelling out picks up ghost error about find
Date: Sun, 07 Aug 2011 16:45:06 -0400

> I often see elisp code using things such as compile-command returning
> spurious errors from a "find" shell command which was not run.

Sorry for the very late reply, but do you still see this bug with the
latest trunk?  I can't reproduce the problem using the recipe you
provided; all I get is

-*- mode: compilation; default-directory: "~/temp/" -*-
Compilation started at Sun Aug  7 16:43:23

perl -Mstrict -cw 'foo.pm'
foo.pm syntax OK

Compilation finished at Sun Aug  7 16:43:23

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.